Submission #653450

#TimeUsernameProblemLanguageResultExecution timeMemory
653450inksamuraiThe short shank; Redemption (BOI21_prison)C++17
80 / 100
2103 ms90568 KiB
#include <bits/stdc++.h> #pragma GCC optimize ("O3") #pragma GCC target ("sse4") #pragma GCC target ("avx,avx2") // cut here #ifdef _MSC_VER #include <intrin.h> #endif namespace atcoder { namespace internal { int ceil_pow2(int n) { int x = 0; while ((1U << x) < (unsigned int)(n)) x++; return x; } int bsf(unsigned int n) { #ifdef _MSC_VER unsigned long index; _BitScanForward(&index, n); return index; #else return __builtin_ctz(n); #endif } } // namespace internal } // namespace atcoder namespace atcoder { template <class S, S (*op)(S, S), S (*e)()> struct segtree { public: segtree() : segtree(0) {} segtree(int n) : segtree(std::vector<S>(n, e())) {} segtree(const std::vector<S>& v) : _n(int(v.size())) { log = internal::ceil_pow2(_n); size = 1 << log; d = std::vector<S>(2 * size, e()); for (int i = 0; i < _n; i++) d[size + i] = v[i]; for (int i = size - 1; i >= 1; i--) { update(i); } } void set(int p, S x) { //assert(0 <= p && p < _n); p += size; d[p] = x; for (int i = 1; i <= log; i++) update(p >> i); } S get(int p) { //assert(0 <= p && p < _n); return d[p + size]; } S prod(int l, int r) { //assert(0 <= l && l <= r && r <= _n); S sml = e(), smr = e(); l += size; r += size; while (l < r) { if (l & 1) sml = op(sml, d[l++]); if (r & 1) smr = op(d[--r], smr); l >>= 1; r >>= 1; } return op(sml, smr); } S all_prod() { return d[1]; } template <bool (*f)(S)> int max_right(int l) { return max_right(l, [](S x) { return f(x); }); } template <class F> int max_right(int l, F f) { //assert(0 <= l && l <= _n); //assert(f(e())); if (l == _n) return _n; l += size; S sm = e(); do { while (l % 2 == 0) l >>= 1; if (!f(op(sm, d[l]))) { while (l < size) { l = (2 * l); if (f(op(sm, d[l]))) { sm = op(sm, d[l]); l++; } } return l - size; } sm = op(sm, d[l]); l++; } while ((l & -l) != l); return _n; } template <bool (*f)(S)> int min_left(int r) { return min_left(r, [](S x) { return f(x); }); } template <class F> int min_left(int r, F f) { //assert(0 <= r && r <= _n); //assert(f(e())); if (r == 0) return 0; r += size; S sm = e(); do { r--; while (r > 1 && (r % 2)) r >>= 1; if (!f(op(d[r], sm))) { while (r < size) { r = (2 * r + 1); if (f(op(d[r], sm))) { sm = op(d[r], sm); r--; } } return r + 1 - size; } sm = op(d[r], sm); } while ((r & -r) != r); return 0; } private: int _n, size, log; std::vector<S> d; void update(int k) { d[k] = op(d[2 * k], d[2 * k + 1]); } }; } // namespace atcoder // cut here using namespace std; #define rep(i,n) for(int i=0;i<n;i++) #define per(i,n) for(int i=n-1;i>=0;i--) #define rng(i,c,n) for(int i=c;i<n;i++) #define fi first #define se second #define pb push_back #define sz(a) (int)a.size() #define vec(...) vector<__VA_ARGS__> #define _3D2ZDxo ios::sync_with_stdio(0),cin.tie(0) typedef long long ll; using pii=pair<int,int>; using vi=vector<int>; void print(){cout<<'\n';} template<class h,class...t> void print(const h&v,const t&...u){cout<<v<<' ',print(u...);} void chmax(pii&a,pii b){ if(a.fi<b.fi){ a=b; }else if(a.fi==b.fi){ a.se=min(a.se,b.se); } } const int _n=8000011; pii _seg[_n]; int lazy[_n]; bool flag[_n]; // struct lazy_segtree{ int n,en; // lazy_segtree(int m){ // init(m); // } void init(int m){ n=m; en=1; while(en<=m){ en*=2; } en*=2; } void build(int node,int l,int r){ if(l==r-1){ _seg[node].fi=0; _seg[node].se=l; return; } int m=(l+r)>>1; build(node*2,l,m); build(node*2+1,m,r); _seg[node].se=l; } void push(int l,int r,int node){ if(flag[node]){ _seg[node].fi+=lazy[node]; if(node*2<en){ lazy[node*2]+=lazy[node]; flag[node*2]=true; } if(node*2+1<en){ lazy[node*2+1]+=lazy[node]; flag[node*2+1]=true; } flag[node]=false; lazy[node]=0; } } void _set(int node,int l,int r,int x,int _l,int _r){ push(l,r,node); if(l>=_r or r<=_l){ return; } if(l>=_l and r<=_r){ lazy[node]+=x; flag[node]=true; push(l,r,node); return; } int m=(l+r)>>1; _set(node*2,l,m,x,_l,_r); _set(node*2+1,m,r,x,_l,_r); // prod seg_node _seg[node]={0,0}; chmax(_seg[node],_seg[node*2]); chmax(_seg[node],_seg[node*2+1]); } void build(){ build(1,0,n); } void _set(int l,int r,int x){ // [l,r) _set(1,0,n,x,l,r); } const int inf=1e9; int op(int l,int r){return min(l,r);} int e(){return inf;} int tar; bool f(int p){ return p>tar; } signed main(){ _3D2ZDxo; int n,k,t; cin>>n>>k>>t; k=min(k,n); vi a(n); rep(i,n){ cin>>a[i]; } vi dl(n,-1); set<pii> st; rep(i,n){ if(sz(st)){ auto it=st.lower_bound({i,-1}); if(it!=st.end()){ dl[i]=(*it).se; } } int val=t-a[i]+i; while(sz(st)){ auto it=st.begin(); pii p=*it; if(p.fi>val) break; st.erase(it); } st.insert({val,i}); } atcoder::segtree<int,op,e> ids(n); init(n); build(); st.clear(); int ans=n; rep(i,n){ if(a[i]<=t) continue; if(dl[i]==-1){ ans-=1; }else{ _set(dl[i],i+1,1); ids.set(i,dl[i]); } } while(k){ push(0,n,1); pii p=_seg[1]; if(p.fi==0) break; ans-=p.fi; int frm=p.se; while(p.fi>0){ tar=frm; int c=ids.max_right<f>(frm); int j=c; _set(dl[j],j+1,-1); ids.set(j,inf); p.fi-=1; } k-=1; } print(ans); }
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...